SPECIES INTERACTIONS
... d) character displacement: divergence of characteristics (i.e. beaks in finches) ...
... d) character displacement: divergence of characteristics (i.e. beaks in finches) ...
Species Competition
... 1. The population overshoots the C.C. 2. This is because of a reproductive time lag (the period required for the birth rate to fall & the death rate to rise). 3. The population has a dieback or crashes. 4. The carrying capacity is reached. ...
... 1. The population overshoots the C.C. 2. This is because of a reproductive time lag (the period required for the birth rate to fall & the death rate to rise). 3. The population has a dieback or crashes. 4. The carrying capacity is reached. ...
Parasitism and Disease - Powerpoint for Oct. 26.
... 1) increase with increasing density of susceptible hosts - N 2) increase with increasing transmission rate beta β 3) increase with increasing fraction of infected hosts that survive long enough to be infectious to other hosts symbolized by f 4) increase with increasing average time that host remains ...
... 1) increase with increasing density of susceptible hosts - N 2) increase with increasing transmission rate beta β 3) increase with increasing fraction of infected hosts that survive long enough to be infectious to other hosts symbolized by f 4) increase with increasing average time that host remains ...
Reptile Blood Parasites - MyeFolio
... Currently, an effective treatment for haemogregarines does not exist. However, it is unlikely that a treatment protocol will be necessary based on the limited ability of haemogregarines to cause clinical disease. Prevention of parasitic infection can be achieved by acquiring reptiles and amphibi ...
... Currently, an effective treatment for haemogregarines does not exist. However, it is unlikely that a treatment protocol will be necessary based on the limited ability of haemogregarines to cause clinical disease. Prevention of parasitic infection can be achieved by acquiring reptiles and amphibi ...
Protozoal Diseases of Wildlife
... • All have complex life cycles • The common feature of all members is the presence of an apical complex in one or more stages of the life cycle. – Secretes enzymes that allow the parasite to enter other cells ...
... • All have complex life cycles • The common feature of all members is the presence of an apical complex in one or more stages of the life cycle. – Secretes enzymes that allow the parasite to enter other cells ...
Parasite Ecology
... • Intensity = # of parasites within a host. • Mean intensity = average number of parasites within infected hosts. • Prevalence = % infected. • Incidence = New Infection/time uninfected at start time • Density = total # in sampling unit. ...
... • Intensity = # of parasites within a host. • Mean intensity = average number of parasites within infected hosts. • Prevalence = % infected. • Incidence = New Infection/time uninfected at start time • Density = total # in sampling unit. ...
V. Relationships in the Ecosystem
... A. Predators and prey 1. Predators are active hunters 2. The organism which is eaten is the prey 3. Population sizes are very closely linked a. Increase and decrease with each other b. Directly proportional ...
... A. Predators and prey 1. Predators are active hunters 2. The organism which is eaten is the prey 3. Population sizes are very closely linked a. Increase and decrease with each other b. Directly proportional ...
Sarcocystis
Sarcocystis is a genus of protozoa. Species in this genus are parasites, the majority infecting mammals, and some infecting reptiles and birds.The life-cycle of a typical member of this genus involves two host species, a definitive host and an intermediate host. Often the definitive host is a predator and the intermediate host is its prey. The parasite reproduces sexually in the gut of the definitive host, is passed with the feces and ingested by the intermediate host. There it eventually enters muscle tissue. When the intermediate host is eaten by the definitive host, the cycle is completed. The definitive host usually does not show any symptoms of infection, but the intermediate host does.There are about 130 recognised species in this genus. Revision of the taxonomy of the genus is ongoing, and it is possible that all the currently recognised species may in fact be a much smaller number of species that can infect multiple hosts.The name Sarcocystis is dervived from Greek: sarx = flesh and kystis = bladder.